Lenze S94P01B2 - Manual (Page 28)

S94P01B2
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Interface
4.4 Communication Interfaces
4.4.1 RS232 Interface (standard)
Programming and diagnostics of the 940 drive is done over the standard RS232
communication port. The baud rate for this port can be configured to one of 7 different
settings, ranging from 2400 to 115200. Drives are addressable with up to 32 addresses
from 0-31. Communication speed and address are set from the drive’s front panel
display.
4.4.2 RS485 Interface (option)
PositionServo 940 drives can be equipped with an RS485 communication interface
option module (E94ZARS41) which is optically isolated from the rest of the drive’s
circuitry. This option module can be used for two functions: drive programming and
diagnostics using MotionView from a PC (with RS485 port) or as a Modbus RTU slave.
The 940 family of drives support 7 different baud rates, ranging from 2400 to 115200.
Drives are addressable with up to 32 addresses from 0-31. The factory setting for
the baud rate is 38,400 with a node address of “1”. The drives address must be set
from the front panel display of the drive. When used with MotionView software, the
communication speed is also set from the front panel display. Please note that baud
rate and address are applied to both RS232 and RS485 interfaces in this case. If used
for Modbus RTU communications, the Modbus baud rate is set as a parameter within
MotionView.
PIN ASSIGNMENTS (RS485 interface)
Pin Name Function
1 ICOM Isolated Common
2 TXB Transmit B
3 TXA Transmit A
4.4.3 Using RS232 and RS485 Interfaces Simultaneously
When establishing communication between MotionView and a 940 drive, a
communication method must be selected. The connection choice can be either “UPP
over RS485/RS232” or “Ethernet”. The “UPP over RS485/RS232” selection establishes
a RS232 connection between MotionView and the first drive on the network. Multiple
drives can then be added to the network via RS485. Each drive on the network must
have a different Node Address. When setting up communications the node address of
the target drive must be set. MotionView will then send out a communications packet to
the first drive on the network, via the RS232 connection. If the node address set in this
packet doesn’t match the node address of the drive, the drive will resend the packet, via
RS485, to the next drive on the network. This process will continue until the target drive
is reached. The following message, “Device with address # not present in the network”
will appear If the target node could not be found.